Hi all, I am having severe pain in the back of my right knee when I am walking, especially on stairs. It pains when I bend my knee in the back. I am working in the sales section and I usually want to stand for a long time, but this knee pain makes me uncomfortable. I have tried some pain killers, but that did nothing to me. One of my friends suggested me to consult a specialist at Physio Now, Mississauga which provides treatment for knee pain ( http://www.physionow.ca/areas-of-injuries/knee-pain-treatment/ ). What are your suggestions?